Volunteers are needed to participate in a paid research study of a new drug for asthma. Participants must be 12 to 75 years old and suffer from moderate to severe asthma that is inadequately controlled. They also must be currently using some type of asthma medicine. The study will include 14 visits and will last approximately one year. Volunteers will be compensated for their participation and for parking or public transportation costs. Please call (312) 563-2651 if you are interested in participating.